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Katalysator, Verfahren zu dessen Herstellung und dessen Verwendung

Low temperature selective carbon monoxide oxidation catalyst useful in e.g. automobile sector to remove carbon monoxide from hydrogen-rich gas comprises platinum and cobalt in specific amount
 
: Chigapov, A.; Susdorf, A.; Carberry, B.

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Frontpage ()

DE 102005057696 A: 20051202
DE 2005-102005057696 A: 20051202
DE 102005057696 A1: 20070802
German
Patent, Electronic Publication
Fraunhofer ISE ()

Abstract
Die Erfindung betrifft einen Katalysator fuer die Oxidation von Kohlenmonoxid (CO) bei niedrigen Temepraturen, wobei es sich um eine auf Platin und Kobalt basierende katalytisch wirkende Zusammensetzung handelt. Einsetzbar ist der Katalysator bei der Entfernung von CO aus wasserstoffreichem Gas fuer die Brennstoffzellen-Technologie. Weitere Anwendungsfelder betreffen den Automobilbereich, insbesondere die effektive Entfernung von CO waehrend des Kaltstarts eines Diesel- oder Benzinmotors sowie Luftreinigungssysteme fuer die Qualitaetskontrolle der Luft in Innenraeumen, z. B. die Entfernung von CO in einem Tunnel, der U-Bahn, Parkhaeusern oder U-Booten.

 

US 20070129247 A1 UPAB: 20070822 NOVELTY - A low temperature selective carbon monoxide oxidation catalyst comprises (wt.%) platinum (1 - 20) and cobalt (1 - 30). DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) an ambient temperature selective carbon monoxide oxidation catalyst comprising (wt.%) platinum (1 - 10) and cobalt (1 - 4), where the catalyst has a greater than 50% conversion efficiency at 22 and 33degreesC; (2) a preferential carbon monoxide catalyst comprising Pt/Co ratio at a constant platinum loading of 1:2 - 4:1 wt.%; (3) a respiratory protection system comprising the preferential CO oxidation catalyst and a support structure of beta-zeolite or zirconium phosphate; and (4) producing a catalyst involving coimpregnating at least one platinum precursor and at least one cobalt precursor so as to deposit platinum and cobalt as catalytic components in an acidic medium onto a support structure; drying and calcining the support structure. USE - For oxidation of carbon monoxide at low temperatures (claimed); for removal of carbon monoxide from hydrogen rich gas for fuel cell technology; in automobile sector for removal of carbon monoxide during cold starting of a diesel or petrol engine, and also in air purification systems for quality control of air in interior spaces, for e.g. removal of CO in a tunnel, underground railway, multistory car parks and submarines. ADVANTAGE - The catalyst has conversion efficiency of greater than 90% at less than or equal to140 (preferably less than 90)degreesC. The process has a preferential CO oxidation activity of greater than 50% at 22 - 33 (preferably less than or equal to30)degreesC. The catalyst effectively oxidizes carbon monoxide at low temperature; and removes CO from hydrogen rich gas thus avoiding poisoning of the electrode.

: http://publica.fraunhofer.de/documents/N-63979.html